Boat A and Boat B have the same mass. Boat A's velocity is three times greater than that of Boat B. Compared to the
kinetic energy of Boat B, the kinetic energy of Boat A is
O one-third as much.
3
O three times as much.
O six times as much.
O nine times as much.

103,000lbs/day of alum need (Al₂(SO₄)³·14 H₂O) are required for a 45 MGD water treatment plant that requires an optimum dosage of 25 ppm Al³⁺ for coagulation.

If the optimum dosage for coagulation is 25 ppm Al³⁺ and the water treatment plant has a flow rate of 45 MGD (million gallons per day), we can calculate the amount of alum required per day as follows:
25 ppm Al³⁺ x 45 MGD = 1,125 pounds of Al₂(SO₄)³·14 H₂O per day
However, the molecular weight of Al₂(SO₄)³·14 H₂O is 594.1 g/mol, which means that 1 mole of Al₂(SO₄)³·14 H₂O weighs 594.1 grams. Therefore, we need to convert pounds to grams by multiplying by a conversion factor of 453.592 grams per pound:
1,125 pounds/day x 453.592 grams/pound = 510,837 grams/day
Finally, we can convert grams to pounds per day by dividing by 453.592 grams per pound:
510,837 grams/day ÷ 453.592 grams/pound = 1,126.4 pounds/day (rounded to the nearest tenth)
Therefore, approximately 1,126.4 pounds per day of alum (Al₂(SO₄)³·14 H₂O) are required for a 45 MGD water treatment plant that requires an optimum dosage of 25 ppm Al³⁺ for coagulation. Rounded to the nearest thousandth, this is approximately 103,000 pounds per day.

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The moles of water are produced from the given reaction, when 275 kJ of energy is given off is 1.08 moles.

The mole (symbol mol) is the SI base unit of material quantity. The amount of substance in an object or sample is a measure of how many elementary entities of a certain substance are present.
Given chemical reaction is:

4NH₃ + 3O₂ → 2N₂ + 6H₂O

From the stoichiometry of the reaction it is clear that 6 moles of water molecule is produced.

Actual moles will be calculated by using the enthalpy and energy value as:

Actual moles of H₂O = 275kJ × (6 mol H₂O)/1530kJ) = 1.08 moles.

Hence required moles of H₂O is 1.08 moles.

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Answer: Electrons

Explanation: Electric current is the flow of charged particles called electrons.

Electric current is the flow of charged particles called electrons. Therefore, option (B) is correct.

An electric current can be described as the stream of charged particles such as electrons flowing through a conductor. The electric current can be determined as the net flow of the charge through the surface of the conductor.

The S.I. unit of the current is ampere which can be defined as the rate of flow of 1-coulomb charge in 1 second.

Electric current can be described as the flow of electrons through the electric conductor. The flow of the free electrons in the conductor creates the electric current.

A continuous source of electrons is needed to generate the electric current. The circuit must be closed so that the electrons can easily flow then only the electric current will flow through it.

Therefore, electrons are the charged particles whose flow produces an electric current.

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Answer:

A) Scandium

B)

C) Gallium

D

The molar concentration of the  cu2 ions is 0.23M.

What is molar concentration?

The best way to describe the concentration of a solute in a solution is in terms of its molar concentration. The term "molarity" (M = mol/L) refers to the total number of moles of solute dissolved in one litre of solution.

What is absorbance?

The amount of light absorbed by a solution is known as its absorbance (A), or optical density (OD). Quantity of light passing through a solution is known as transmittance.

Therefore, the molar concentration of the  cu2 ions is 0.23M.

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The hydrogen bonds in the beta-pleated sheet are perpendicular to the direction of the protein chain, whereas, in the alpha helix, they are parallel to the direction of the protein chain. This results in different structural characteristics and functions for each of these secondary structures.

The beta-pleated sheet consists of strands of amino acids that run parallel or anti-parallel to each other, forming a sheet-like structure. The hydrogen bonds between adjacent strands hold them together, resulting in a stable, rigid structure.

The direction of the hydrogen bonds in the beta-pleated sheet allows for flexibility and the ability to withstand stress from different directions. In contrast, the alpha helix consists of a single, tightly coiled strand of amino acids that is stabilized by hydrogen bonds running along its length.

This results in a strong, stable structure that is suited for roles such as providing structural support or serving as a binding site for other molecules.

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\({ \red{ \underline{ \tt{Langmuir \: adsorption \: isotherm:}}}}\)

The defect of Freundlich adsorption isotherm is that it fails at high pressure of the gas.

Langmuir derived the adsorption isotherm based on the theoretical considerations. It is generally applied to chemical adsorption.

It can be expressed as

\({ \blue{ \bold{ \frac{X}{m} = \frac{AP}{1+BP}}}}\)

where,

X = mass of the gas adsorbed

M = mass of the adsorbent

P = equilibrium pressure

The mass of one mole of pennies is 1.326 × 1024 grams.

To determine the mass of one mole of pennies, we need to find the number of pennies in one mole and then multiply that by the mass of one penny. A mole of a substance is defined as the number of atoms, molecules or ions present in the substance and is equal to Avogadro's number, which is 6.022 × 1023.

Since one penny weighs about 2.2 grams, we can calculate the mass of one mole of pennies as follows:1 mole of pennies = 6.022 × 1023 pennies The mass of one mole of pennies = Number of pennies in one mole × Mass of one penny= 6.022 × 1023 × 2.2 grams= 1.326 × 1024 grams Therefore, the mass of one mole of pennies is 1.326 × 1024 grams.

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The total number of unpaired electrons in the 3d orbitals of Cr⁺³ is:

c. 3.

An unpaired electron is an electron that occupies an orbital of an atom singly, rather than as part of an electron pair.

To determine the number of unpaired electrons in the Cr⁺³ion, we need to consider the electron configuration of the neutral chromium (Cr) atom and the 3+ charge.

The atomic number of chromium is 24, and its electron configuration is [Ar] 3d⁵ 4s¹. When Cr loses three electrons to form the Cr⁺³ ion, the 4s¹ electrons are lost first before the 3d electrons.

So, in the Cr⁺³ ion, the electron configuration becomes [Ar] 3d³.

To determine the number of unpaired electrons, we look at the 3d sublevel, which can hold a maximum of 10 electrons. In the case of Cr⁺³, we have 3 electrons in the 3d orbitals.

Since each orbital can hold a maximum of 2 electrons, and there are 3 unpaired electrons in the 3d orbitals, the total number of unpaired electrons in the Cr⁺³ ion is 3.

Therefore, the correct answer is 3.

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Answer:

The strength of the forces holding the particles of a substance together determines its physical state at a given temperature. The stronger the forces the more energy required to overcome them and hence the particles remain in a fixed position and the substance is solid, while weaker forces may allow the particles to move freely making the substance a gas.

Explanation:

In the case of carbon dioxide (CO2), the particles are held together by weak van der Waals forces. These forces are not strong enough to keep the particles in a fixed position, so they are able to move freely and take on the properties of a gas at room temperature.

In the case of water (H2O), the particles are held together by hydrogen bonds. These bonds are stronger than the van der Waals forces in CO2, so the particles are not able to move as freely. As a result, water takes on the properties of a liquid at room temperature.

Salt (NaCl) is made up of positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-). These ions are held together by strong ionic bonds, which keep the particles in a fixed position. As a result, salt takes on the properties of a solid at room temperature.

Develop bioluminescence would you be more likely to find in the jellyfish that lives in the deeper waters of the ocean.

Light generated by a chemical reaction inside a living thing is known as bioluminescence. A type of chemiluminescence known as bioluminescence is simply a chemical process that results in the production of light.

A "cold light" is what bioluminescence is. Less than 20% of a light's energy is used to produce thermal radiation, or heat.

The ocean is the most common habitat for bioluminescent creatures. Fish, bacteria, and jellies are among the marine creatures that glow bioluminescent. Fireflies and fungus are two examples of the bioluminescent creatures that can be found on land.

Therefore, Develop bioluminescence would you be more likely to find in the jellyfish that lives in the deeper waters of the ocean.

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Refer to the attachment

Answer:

hi

Explanation:

Represent Electron of Carbon as dot (•) and that of halogen as cross (×)

Lewis dot diagram

The lewis dot diagram of the C₂IBr is shown in the attached diagram below.

A lewis electron dot structure represents the bonding atoms, the number of bonds, and the lone pairs left in the atoms in the molecule.

As the valence electrons of carbon, bromine, and iodine are four, seven, and seven electrons respectively.

First, the total number of valence electrons present in the molecule is 4 + 4 + 7 + 7 = 22.

As carbon is the least electronegative atom among C, Br, and I so it takes the central atom of the molecule or ion. Generally, the lone pairs of electrons are assigned to the most electronegative atoms first in the molecule.

As every atom does not have complete an octet once the lone pairs are assigned then a triple bond must be drawn to complete the octet of each atom.

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Answer:

Towards the products, or to the right

Explanation:

There are no provided answer choices, but the answer should be to the right.

By Le Chatelier's principle, which basically can be summarized as "if you mess with chemistry, chemistry messes back", if more reactants are added, the equilibrium will shift to the right towards the products in order to make more products and counteract the increase in I₂.

Answer:

Dipole dipole interaction

Explanation:

Answer:

The new volume is 5.0L

Explanation:

Given:

Initial pressure (P₁) = 1.4 atm

Initial volume (V₁) = 2.3 L

Final pressure (P₂) = 0.65 atm

We'll use Boyle's Law:

P₁V₁ = P₂V₂

Substituting the given values:

(1.4 atm)(2.3 L) = (0.65 atm)(V₂)

Now, let's solve for V₂:

V₂ = (1.4 atm * 2.3 L) / 0.65 atm

Calculating this expression step-by-step:

V₂ = (3.22 atm·L) / 0.65 atm

V₂ ≈ 4.953 L

Rounded to one decimal place, the new volume is approximately 5.0 L.

Answer:

Biopolymers are natural polymers produced by the cells of living organisms. Biopolymers consist of monomeric units that are covalently bonded to form larger molecules. There are three main classes of biopolymers, classified according to the monomers used and the structure of the biopolymer formed: polynucleotides, polypeptides, and polysaccharides.

Explanation:

The noble gas core that would be used when writing the ground state electron configuration for magnesium is Ne.

A noble gas that precedes the elements in the periodic table. We write the noble gas configuration by writing the valence electrons followed by the noble gas nucleus. They are called noble gases because they are very majestic and generally do not react to anything.

Noble gases are colorless odorless tasteless and non-flammable under normal conditions. They were called group 0 in the periodic table because they were believed to have zero valences, meaning that the atoms cannot combine with atoms of other elements to form compounds. It is very inert because the valence shell is filled.

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The overall speed of sound would slow down if the room's temperature dropped by 20 C degrees.

This is due to the fact that molecules clash more frequently at lower temperatures, giving the sound wave more opportunities to move quickly. Sound travels through air at a speed of 331 meters per second at zero degrees Celsius (about 740 mph). But sound travels at a speed of 343 meters per second at 20oC, or room temperature (767 mph).

Higher temperatures give molecules more energy, causing them to vibrate more quickly and facilitating faster sound wave propagation. When air is at normal temperature, sound travels at a 346 mph.

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Answer:

The H—C—H bond angle in methane is the tetrahedral angle, 109.5°. This angle is obtained when all four pairs of outer electrons repel each other equally. The bond angles in water is less than 109.5° because of the stronger repulsion by their lone pairs of electrons.

one of the BEST actions the US government can take to slow global warming is invest in clean technologies such as wind and solar power

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Answer:

D.HI

Explanation:

because this is the most different

By using the ideal gas law to get volume we have"

Where v is volume, T is temperatute, n is number of moles, R is the molar gas constant and P is pressure. At STP P= 101,325 Pa, T= 273.15 K and R= 8.314 J/mol K

We must first convert mass to moles:

By substituting this value into the ideal gas law we have:

1.9502e-6L of H2 gas reacted at STP

The best way to explain how baking a cake or frying an egg is a chemical change is that the end products of both cannot be reversed to their original forms. Thus, option D is correct.

In both baking a cake and frying an egg, the process involves a chemical reaction that causes a permanent change in the substances involved. In baking, the ingredients undergo a chemical transformation through reactions such as the interaction of flour, sugar, eggs, and leavening agents like baking powder or baking soda.

The heat applied during baking causes these reactions to occur, resulting in the formation of a completely new substance with a different structure, texture, and taste.

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Your question is incomplete, most probably the full question is this:

Which of the following is the best way to explain how baking a cake or frying an egg is a chemical change?

A. Both are changing size and shape.

B Heat is changing the texture of both substances.

C Heat is being added to both, causing a phase change.

D The end products of both cannot be reversed to their original forms.

The molar solubility of mercury (II) bromide (HgBr2) is 7.00 × 10^-7 M. This is the long answer to the problem.

To perform calculations using Ksp for the given equilibrium HgBr2(s)  ↔ Hg2+(aq) + 2Br-(aq) and find the molar solubility of mercury (II) bromide (HgBr2) we have to use the solubility product expression.Ksp for HgBr2 is 6.2 × 10^-20Ksp = [Hg2+][Br-]^2 Since the initial concentration of HgBr2 is given as s, and after dissociation, the concentration of Hg2+ becomes s, while the concentration of Br- becomes 2s.[Hg2+] = s M and [Br-] = 2s MThus,Ksp = [Hg2+][Br-]^2= s(2s)^2= 4s^3= 6.2 × 10^-20Molar solubility of HgBr2 is given as s, therefore;s = (6.2 × 10^-20/4)1/3s = 7.00 × 10^-7 M

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Explanation:

charged particles=8 which is proton and proton=no.of electron. That's why 8 particles are revolving round this center. And this atom structure is of oxygen

If the center of an atom has 8 charged particles that are protons as the neutrons are neutral there will be 8 negative charges that are electrons revolving around the center nucleus.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether it is  solid,liquid or  gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged particles  and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged  particles and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

1937.6g

Explanation:

According to the question, a sample of tungsten II sulphate (WSO4) contains 4.17 × 10^24 molecules. This means that the number of moles can be calculated by dividing the number of molecules by Avagadro's number (6.02 × 10^23).

Number of moles of WSO4 = 4.17 × 10^24 ÷ 6.02 × 10^23

n = 4.17/6.02 × 10^(24-23)

n = 0.692 × 10^1

n = 6.92moles

Where; W = 184g/mol, S = 32g/mol, O = 16g/mol

The molar mass of tungsten II sulphate (WSO4) is calculated as follows;

WSO4 = 184 + 32 + 16(4)

= 184 + 32 + 64

= 280g/mol

mole = mass ÷ molar mass

mass = molar mass (MM) × number of moles (n)

mass = 280 × 6.92

mass = 1937.6g